GCC e-Invoice Preflight Oracle

tech.noahsarchPublished by noahsarch.techOfficial publisherv0.1.1Updated Nov 1, 2026

Validate UAE PINT AE and Saudi ZATCA e-invoices: UBL, official Schematron, QR, fix hints.

The publisher's own server: Business-Day Oracle

VerifiedStreamable HTTPWeb executableFinance Business & Commerce

Server details

Identifier: tech.noahsarch/einvoice-preflight
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Nov 1, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to noahsarch.tech, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Remote MCP server that preflights UAE PINT AE and Saudi ZATCA e-invoices, returning verdicts, official rule findings and fix hints.

What you can do: Validate one UBL Invoice or CreditNote against UBL 2.1 XSD, the PINT AE Schematron and UAE cross-checks, or a ZATCA pre-check
Run batch preflight of up to 100 documents with readiness percentage, top rejection rules and optional printable HTML
Extract seller, buyer, totals, VAT breakdown and rule set from a UBL document without validating
Look up official PINT AE rule ids, severities and texts, filtered by severity or text
Check a UAE TRN format and derive the Peppol 0235 participant identifier
Decode or encode the base64 TLV of a Saudi e-invoice QR
When to use it: Useful when you prepare or test UAE or Saudi e-invoices and want to catch schema, Schematron and QR problems before submitting to an Accredited Service Provider or ZATCA, including ERP regression batches and go-live readiness checks.
Requirements: Remote streamable HTTP endpoint; no local install. An X-API-Key header from the provider is needed for paid tools such as batch readiness reports; the catalogue and free tools work without it.

Before you install

Batch readiness reports are charged per document, so calls can cost money. Invoice documents are sent to a third-party service; the server states they are validated in memory and not stored or logged. Treat the API key as a secret.

Installation

In SourceWeft

Open GCC e-Invoice Preflight Oracle in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/tech.noahsarch%2Feinvoice-preflight/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "gcc-e-invoice-preflight-oracle": {
      "type": "http",
      "url": "https://einvoice.noahsarch.tech/mcp"
    }
  }
}

Tools

validate_invoice

Validate one e-invoice (UAE PINT AE / KSA ZATCA)

Full preflight of one UBL Invoice or CreditNote: XML well-formedness, UBL 2.1 XSD, the official PINT AE Schematron (≈300 rules incl. the UAE jurisdiction overlay) or the ZATCA pre-check, plus advisory cross-checks. Returns a verdict and every finding with rule id, severity, fields, location and fix hint. Example: xml '<Invoice …>', jurisdiction 'auto'. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parametersxmlrequiredpreflightinclude_infojurisdiction

readiness_report

Validate up to 100 e-invoices and summarise readiness

Batch preflight for a go-live check or an ERP regression suite: per-document verdicts, readiness percentage, the most frequent rejection rules across the batch, optional printable HTML. Charged per document. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parametersformatdocumentsrequiredpreflightjurisdiction

extract_summary

Read the key fields of a UBL invoice

Seller/buyer (names, TRN, endpoint, legal registration, emirate), dates, currency, totals, VAT breakdown, line count, payment means, attachments and the detected rule set — without validating. Free. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parametersxmlrequired

list_rules

List the official PINT AE rules

Rule ids, severities and texts from the installed PINT AE Schematron (shared PINT rules and the -ae jurisdiction rules), filterable by severity or text, with fix hints where we have them. Free. Example: contains 'TaxPointDate'. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parameterscontainsseverityjurisdiction

check_trn

Check a UAE TRN and derive the Peppol endpoint

Format check of a UAE Tax Registration Number (15 digits) and derivation of the TIN / Peppol participant identifier (scheme 0235 = first 10 digits). Free. Example: trn '100 1234 5670 0003'. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parameterstrnrequired

zatca_qr_decode

Decode a ZATCA QR (TLV)

Decode the base64 TLV of a Saudi e-invoice QR into seller name, VAT number, timestamp, totals, hash, signature and key tags, with phase detection and format issues. Free. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parametersqrrequired

zatca_qr_encode

Build a ZATCA QR (TLV) payload

Encode the five phase-1 fields (plus optional phase-2 hash/signature/key tags) into the base64 TLV string that goes into the QR image and the UBL QR reference. Free. Response: result with verdict (ACCEPTED | ACCEPTED_WITH_WARNINGS | REJECTED), findings[] (id, severity, message, fields, location, fix_hint, source = xsd | schematron | preflight), counts, ruleset version and timings, plus data_confidence, estimated_items[], sources[], data_version, warnings[] and a disclaimer. Documents are validated in memory and never stored or logged.

Parameterstimestamprequiredvat_totalrequiredpublic_keyvat_numberrequiredseller_namerequiredinvoice_hashtotal_with_vatrequiredecdsa_signaturecertificate_signature

Version history

v0.1.1LatestNov 1, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.